From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Performance graph showing the effect of various tappet clearances for a 104° camshaft engine.
| Identifier | ExFiles\Box 1\10\ B001_X106 TO X 110-page041 | |
| Date | 12th July 1932 guessed | |
| EFFECT OF VARIOUS TAPPET CLCES. 104° CAMSHAFT INLET VALVE THROAT 1.200 PLUG REACH .950 OPEN EXHAUST 1 5/8" THROTTLE S.U. 5.85 C/R B.H.P. R.P.M. B.M.E.P. INLET .020 / Ex .020 INLET .020 / Ex .005 .004/.006 INLET .020 Valve Timing Diagram: IN Ex 9 3 29 37 .020 CLCE RM.{William Robotham - Chief Engineer} PR.{Percy H. Rose} 16 | ||